For an atoms electrons, how many energy sub levels are present in the principal energy level n=4? a. 4 b.9 c.10 d.16 e.32

In a ni-cd battery, a fully charged cell is composed of nickelic hydroxide. nickel is an element that has multiple oxidation states. assume the following proportions of the states: nickel charge proportions found 0 0.17 +2 0.3 +3 0.33 +4 0.5 (a) determine the mean of the nickel charge. enter the answer to 2 decimal places.(b) determine the cumulative distribution function of nickel charge.

The fact that the total amount of energy in a system remains constant is a(n)

How many moles are contained in 5.6 l of h2 at stp